mixChannels16u   1164 modules/core/src/convert.cpp         (MixChannelsFunc)mixChannels8u, (MixChannelsFunc)mixChannels8u, (MixChannelsFunc)mixChannels16u,
mixChannels16u   1165 modules/core/src/convert.cpp         (MixChannelsFunc)mixChannels16u, (MixChannelsFunc)mixChannels32s, (MixChannelsFunc)mixChannels32s,